Press for molding stereotype matrices



Sept. 25, 1934. KK, SCHAEFLEIN 1,974,899

PRESS FOR MOLDING STEREOTYPE MATRICES Filed Jan. 2l, 1933 f l n lll fnv en for' Patented Sept. 25, 1934 Mrs.

'i' FICE PRESS FOR MOLDING STEREOTYPE MATEICES Karl Schaeilein, Bern, Switzerland Application January 21,

1933, Serial No. 652,847

In Germany February 11, 1932 3 Claims.

In mechanical presses for molding stereotype matrices, either a pair of toggle levers, r an oscillating crank, is used to move the press head or platen. By using toggle levers a straight line Il motion is obtained, but such levers have the drawback that the knee joint is subjected to great wear. An oscillating crank has no such knee joint but requires a jointed. connection of the connecting rods with the press head. This press head is therefore mostly supported by swinging side arms, and, in that case, the exact guidance, so important for the molding of matrices, is not properly assured.

The present invention relates to a molding press having an oscillating crank connected to the press head by connecting rods. In order to obtain a suiiiciently long guidance for the press head, this head, according to the invention, is guided in a straight line in the press frame, ii' possible, in the entire height of the molding table or platen by side plates fastened to same, whereas the connecting rods are each provided in the closed space between these plates and the frame.

Such a long guidance can not be obtained if the connecting rods are arranged outside.

On the accompanying drawing a molding press according to the present invention is illustrated by way of example,

Fig. 1 being a side elevation, and

Fig. 2 a vertical section through the middle of the press head.

The lever a swings in the bearing b under the inuence of the connecting rod c which is moved by a crank disc d. The disc d is driven in known manner by a motor through the agency of the worm e, worm wheel f, and spur wheels y, h, i. At the side of the lever a are provided trunnions, 7c, Z, with which the connecting rods m, n engage. 'Ihese connecting rods are jointed at their top 4c ends with the press head o. The press head is guided in the frame p by means of the side plates q, r which are arranged outside of the connecting (Cl. IGI-12) rods m, n, so that the entire height of the frame can be used to guide the press head o.

What I claim and desire to secure by Letters Patent of the United States is:-

1. A press for molding stereotype matrices, having in combination, a frame, a press head, means for guiding said press head in said frame,

a connecting rod pivoted to said head, an oscillating lever having oppositely extending arms,

a pivotal connection between said lever and said connecting rod, means mounting one arm of said lever in said frame so that said lever can be swung about a fulcrum located above said pivotal connection, and means engaging the other arm of said lever for oscillating said lever.

2. A press for molding stereotype matrices, having in combination, a frame, a press head, means for guiding said press head in said frame, a connecting rod pivoted to said head, an oscillating lever having oppositely extending arms, a pivotal connection between said lever and said connecting rod, means mounting one arm of said lever in said frame so that said lever can be swung about a fulcrum located above said pivotal connection, and means engaging the other arm of said lever for oscillating said lever, said connecting rod being arranged to swing between said frame and said guiding means.

3. A press for molding stereotype matrices, having in combination, a frame, a press head, means including side plates for guiding said press head in said frame, a connecting rod pivoted to said head, an oscillating lever having oppositely extending arms, a pivotal connection between said lever and said connecting rod, means mounting one arm of said lever in said frame so that said lever can be swung about a fulcrum located above said pivotal connection, and means engaging the other arm of said lever for oscillating said lever, said connecting rod being arranged to swing between said frame and said side plates.

KARL SCHAEFLEIN. 

